Cutter-head.



J. M. CRAWFORD.

CUTTER HEAD.

APPLICATION FILED JULY 2a, 1913.

Patented Nov. 24, 1914.

ATTORNEYS JOHN MACK CRAWFORD, OF EL .PASO, TEXAS.

CUTTER-HEAD.

Specificationof Letters Patent. Patented Nov. 2 1, 1914:.

Application filed July 23, 19.13. SerialNo. 780,645.

To all whom it may concern:

Be it known that I, :JOI-IN MAC CRAW- rono, a citizen of the UnitedStates, and a resident of El Paso, in the county of El Paso and State ofTexas, have invented a new and Improved Cutter-Head, of which thefollowing is a full, clear, and exact description.

My invention relates to cutter heads for woodworking machinery,principally used in the manufacture of window sashes, doors, blinds, orany other pattern of stickings; and it has reference more particularlyto a cutter head having interchangeable bit carriers or bit seats.

The object of the invention is to provide a simple,strong andinexpensive cutter head which can be easily and quickly changed fromsashes to doors or any other pattern of sticking regardless of the stockthickness and without removing the head from the machine which carriesthe bits, and which device will not call for a horizontal adjustment onthe machine when a change in pattern or thickness of stock is made.

The invention consists of the construction and combination of parts tobe more fully described hereinafter and fully set forth in the claim.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which like characters indicate correspondingparts in all the views and in which:

Figure 1 is an elevation of an embodiment of my invention partly brokenaway to show the details of construction; Fig. 2 is a plan view of thesame, also partly broken away to show details of structure; and Fig. 3is a perspective view of a bit and its carrier seat ready to be insertedinto the head.

Referring to the drawings, the cutter head is formed of a flangedportion 5 provided on both of its faces with central portions 6 integralwith the flange. A central bore 7 is provided in the head by means ofwhich the same is fitted on the spindle of the machine.

The flange 5 is provided with diametrically opposite recesses 8 formedon its lateral surface; one-half 9 of each recess, in a directionparallel to the axis of the head, is circular in shape, having itscenter adjacent the lateral surface; while the other half 10 of therecess is rectangular adjacent the periphery of the flange andsemi-circular adjacent the central portion of the same. This 1 second.partlO of the recess being smaller than the first part 9, a shoulder11. is formed between thetwo portions forming the recess. Theconsecutive recesses on theflange are staggered, so that the portion 9of one recess is on the same face as the portion 110 of the adjacentrecess. The portion 10 of the recess is provided with a groove 12substantially parallel to the face of the flange.

Fitting into the portion 10 of the recess is a bit carrier or seat 13having a lateral projection 14, preferably of rectangular shape,fittingsnugly into the groove or keyway 12 of the recess portion 10. Thisprojection 14 corresponds to the groove; and the reason for making thesame rectangular is to give a better seat to the carrier within the headnear the central portion of the same. Mounted on the bit carrier 13 is acylindrically shaped bit 15 which is axially secured by means of a bolt16 to the carrier previous to its being mounted in the. head. The bitcarrier is locked to the head, that is to the flange, by means of a setscrew 17 threaded into the flange portion and the bit carrier.

By means of my device an exchange of slid into position and again lockedby means of the screw. The bit carrier 13 being adapted to receive anyshape of bit, and being always in the same position in the head, willput the bit in the proper position with reference to the head and,therefore, no adjustment of the machine for the bit is necessary. Theprovision of the shoulder 11 in the recesses 8 forms a base for the bitmounted on the carrier and, therefore, relieves the strain from thecarrier and puts the same on to the flange portion, which is part of thehead. Attention is called to the fact that due to the lateral movementof the bit carriers the same are always in exact relation to the head;and no horizontal displacement of the head is necessary, due to thatprovision.

Having thus described my invention, I

claim as new and desire to secure by Let- ATE orsron periphery of theflange, said recess forming a large and a small portion in said flange,

said small portion of the recess having a groove extending through theentire lateral 5 surface thereof and substantially parallel to the faceof the flange, a cutter-carrier adapted to engage the small portion ofthe recess from the periphery of the flange, said cutter-carrier havinga shoulder portion fitting slidably into said groove, means for lookingthe outter-oarrier to said flange, and

JOHN MACK CRAWFORD. Witnesses:

O. B. WILSON, A. F. /VILSON.

Goples of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

